If Amin = 40 and Amax = 60, what is the percentage of modulation?

Solution (By Examveda Team)

The correct answer is Option A: 20%.
Here's why:
Modulation percentage in Amplitude Modulation (AM) tells us how much the amplitude of the carrier signal changes.
It's calculated using the formula: Modulation Percentage = [(Amax - Amin) / (Amax + Amin)] * 100
Where:
Amax is the maximum amplitude of the modulated signal.
Amin is the minimum amplitude of the modulated signal.
In this problem:
Amax = 60
Amin = 40
So, let's plug in the values:
Modulation Percentage = [(60 - 40) / (60 + 40)] * 100
Modulation Percentage = [20 / 100] * 100
Modulation Percentage = 0.2 * 100
Modulation Percentage = 20%
Therefore, the percentage of modulation is 20%.